Isaiah 52:13
“הִנֵּה יַשְׂכִּיל, עַבְדִּי; יָרוּם וְנִשָּׂא וְגָבַהּ, מְאֹד”
“behold, My servant will prosper, He will be high and lifted up and greatly exalted.”

The Hebrew word for ‘servant’ is ‘עבד’, which means ‘worker’ and a ‘slave’. The aspect of ‘slave’ is by knowing that the Torah is truth to be followed. ‘Worker’ is the aspect of those who follow the precepts and reveal the Light of the Creator in the world.
The Zohar reveals that the reward for those righteous people will be a higher elevation to see the full revelation of the Light in the world.

Isaiah 30:26
“וְהָיָה אוֹר הַלְּבָנָה כְּאוֹר הַחַמָּה וְאוֹר הַחַמָּה יִהְיֶה שִׁבְעָתַיִם כְּאוֹר שִׁבְעַת הַיָּמִים בְּיוֹם חֲבֹשׁ יְהוָה אֶת שֶׁבֶר עַמּוֹ וּמַחַץ מַכָּתוֹ יִרְפָּא”
“Moreover, the light of the moon will be as the light of the sun, and the light of the sun will be sevenfold, as the light of seven days, in the day when YHVH binds up the brokenness of his people, and heals the wounds inflicted by his blow”